Donald Trump took to Twitter Monday morning in defense of his daughter, Ivanka, after she sat in for him at a G20 meeting over the weekend and caused a major public uproar.

"When I left Conference Room for short meetings with Japan and other countries, I asked Ivanka to hold seat. Very standard. Angela M agrees!" he wrote, referring to German Chancellor Angela Merkel. "If Chelsea Clinton were asked to hold the seat for her mother, as her mother gave our country away, the Fake News would say CHELSEA FOR PRES!"

On Saturday, Ivanka was present during a session when her father had to briefly leave the meeting, a White House official told The New York Times. Ivanka then took her father's seat at the table to join a "discussion of topics that were relevant to her." According to the administration, other leaders similarly stepped away from the meeting while members of their respective delegations filled in. But because this particular member of the U.S. delegation happened to be the president's daughter—and Trump insists on tapping family members to serve among his top advisers (see: Jared Kushner)—Ivanka's presence at Saturday's meeting drew plenty of criticism on her father's preferred method of communication: Twitter.

Ivanka's presence did, however, draw support from the leader of the G20 host nation, Angela Merkel.

"The delegations themselves decide, should the president not be present for a meeting, who will then take over and sit in the chair,” Merkel said during a news conference on Saturday, according to Bloomberg Politics. “Ivanka Trump was part and parcel of the American delegation, so that is something that other delegations also do. It’s very well known that she works at the White House and is also engaged in certain initiatives.”

As Trump called her on Twitter, "Angela M" was fine with Ivanka's actions. But as for his claims about Chelsea Clinton, she had her own thoughts to offer on the situation—and they certainly weren't as kind as Angela M's.